问根据用户在本地机器上的时间戳更改样式表。Javascript解决方案？

EN

$stylesheets = array(
    'foo.css',
    'bar.css',
    'baz.css',
    // ...
    'qux.css'
);

$numStylesheets = count($stylesheets);

if (24 % $numStylesheets !== 0) {
    echo 'Number of stylesheets needs to be a factor of 24.';
    exit;
}

$hour = (int)date('H', $_SERVER['REQUEST_TIME']);
$changeEveryXHours = 24 / $numStylesheets;
$offset = floor($hour / $changeEveryXHours);
$stylesheet = $stylesheets[$offset];

echo '<link rel="stylesheet" href="', $stylesheet, '" />';

var stylesheets = [
    'foo.css',
    'bar.css',
    'baz.css',
    // ...
    'qux.css'
];

if (24 % stylesheets.length != 0) {
    alert('Number of stylesheets needs to be a factor of 24.');
    return false;
}

var now = new Date();
var hour = now.getHours();
var changeEveryXHours = 24 / stylesheets.length;
var offset = Math.floor(hour / changeEveryXHours);
var stylesheet = stylesheets[offset];

// If you're using jQuery, I think it's something like this:
$('<link>')
    .prop({
        rel: 'stylesheet',
        href: stylesheet
    })
    .appendTo($('head'));

function do_it()
{
 now = new Date();
 current_time = now.getHours()+':'+now.getMinutes()+':'+now.getSeconds();
$.ajax({
  type: "POST",
  url: "your_php_script.php",
  data:{ current_user_time: current_time}
}).done(function( data ) {
//maybe you will need some logic here :) 
//and get the old file name 
  $('link[href^=old_css_file.css]').attr('href',data);
});
}

setInterval(function(){ 
do_it();
//cal it every 3 hours 
}, 10800000);